[15]. Ibid., chap. vii., § 1, p. 206.
[16]. Ibid., chap. vi., § 27, p. 190.
[17]. Essay, pp. 191, 192.
[18]. Ibid., p. 148.
[19]. Ibid., pp. 151, 152.
[20]. Ibid., p. 154.
[21]. Ibid., p. 166.
[22]. Ibid., p. 155.
[23]. More Worlds than One, p. 52.
[24]. Essay, p. 188.